Apparatus for lighting and extinguishing gas-lamps.



H. H. JOHNSON & B. MOIN. APPARATUS FOR LIGHTING AND EXTINGUISHING GASLAMPS.

APPLICATION FILED MAY 15 1907.

Patented Oct. 2'7, 1908.

2 SHEETS-SHEET 1.

mm w f; a 7 H 2 If A I m g m 0 fiw n/ 2 f 5% 8 J a F 7 mblesses Tnsumuus wsrsns 0a.. wnsnmran. n. c

H. H. JOHNSON & B. MOIN. APPARATUS FOR LIGHTING AND EXTINGUISHING GASLAMPS.

APPLICATION FILED MAY15, 1907.

Patented Oct. 27, 1908.

III/III 2 sums-SHEET 2.

7 lrllllvrfllvrfllrrlllrrl zrllfflllllllly III/11111 III! Ed ward 7780 II I r I r I I I I r I I 4 I III/ III

mziless s ms NORRIS FEYERS ca, WAsnlndTuN, n. I:v

UNITED STATES minus @FFICE.

HERBERT HENRY JOHNSON, OF FORBES, AND EDWARD MOIN, OF SYDNEY, NEW SOUTHWALES. AUSTRALIA.

Specification of Letters Patent.

Patented Oct. 27, 1908.

Application filed May 15, 1907. Serial No. 373,839.

To all whom it may concern:

Be it known that we, HERBERT HENRY JOHNSON and EDWARD Mom, subjects ofthe King of Great Britain, residing at Lachlan street, Forbes, in theState of New South Wales, Australia, and at 737 George street, Sydney,in said State, respectively, have invented certain new and usefulImprovements in Apparatus for Lighting and Extinguishing Gas-Lamps, ofwhich the following is a speci fication.

This invention relates to improved apparatus for lighting andextinguishing gas lamps provided with a pilot or automatic igniter, byvarying the pressure in the main from the regulator at the gasworks orother Central station, and has been designed with the view to providingsuch an apparatus which will operate reliably between a range of anyreasonable maximum pressure and a predetermined minimum pressure.

The apparatus is comparatively inexpensive to construct and theemployment of le vers, s rin s and like mechanical parts is dispensecOur invention consists essentially of two gasometers or bells providedwith suitable liquid seals and contained in a chamber or chambers. Oneof said bells has a larger effective cross-sectional area than the otherwhich has within it a hood or cover and a seal therefor. The smallerbell is weighted to slightly resist the ordinary or normal pressure inthe main while the larger one is Weighted so that it will descendfurther into its seal whenever the pressure falls below the minimum.determined upon. But in order that our invention may be clearlycomprehended we will refer to the accompanying drawings in which Figure1 is a perspective view of the appa-' ratus showing a pipe leading to aburner, and a pilot light. Fig. 2 is a central sectional elevationshowing the position of the bells at the unlighted position. Fig. 3 is asimilar view showing the position the smaller bell takes when thepressure is raised above the normal, while, Fig. 4 is a similar viewshowing the position of the bells when the gas lamp is burning.

The same numerals refer to the same or corresponding parts.

5 is the smaller bell contained in the chamber 6 having the mercury orother seal 7.

8 is the inlet pipe from the main, and 9 a hood or cover which lies overthe outlet pipe 10 which is surrounded by a seal 11.

12 represents a tray or receptacle for shot or other weights. From theoutlet 10 the gas passes into the second bell 13 in the chamber 14 bythe inlet 15 said bell being also provided with a liquid seal 16.

17 is a receptacle for weights and 18 the outlet pi e to the burner 19.

2O and 21 are suitable guide rods while 22 and 23 are brackets on thebells 5 and 13 respectively carrying suitable friction rollers 25 whichtravel on the fixed guide rod 24. The bracket 22 rests on the bracket23.

The operation of the apparatus is as fol lows :The bell 5 is weightedsufliciently to resist being lifted by the normal pressure in the mainwhich for illustrative purposes we will say is 25 units. The pressure inthe main is then raised to say 26 or more units thereby lifting saidbell 5 and consequently raising the hood 9 out of the seal 11 (as shownin Fig. 3) allowing the gas to enter the outlet pipe 10 leading to theweighted second bell 13 which it lifts (Fig. 4) on overcoming theweight, thus permitting the gas to pass to the burner where it isignited by the pilot which is always alight. The pressure in the main isthen lowered to the normal (25 units) but the bell 13 having a largercapacity and assisting through its bracket 23 supports the bracket 22 tohold up the bell 5.

The bell 13 is weighted to resist closing lower in its seal until thepressure is reduced below the minimum, which for example is 15 units. Toextinguish the light the pressure in the main is reduced below 15 unitsthereby enabling the bell 13 to descend further in its seal and allowingthe bell 5 to do likewise. To relight the lamp it will be necessary toincrease the pressure in the main to over the normal that is accordingto our illustration over 25 units.

It will be understood that the bells are never raised out of their sealsand that the hood is only lifted from its seal to permit the passage ofgas.

It is obvious that the bells could operate in one large chamber providedthey Were suitably sealed, and that the details of the apparatus couldbe modified without departing from the leading features.

Having thus described our invention what we claim as new and desire tosecure by Letters Patent is 1. In a gas regulator, the combination of apair of communicating gasometers, one of which is adapted to receive gasfrom a gas main and the other gasometer being adapted for attachment toan outlet pipe, a gas controlling device operable by the receivinggasometer for regulating the flow of gas therefrom to the othergasometer, and a device operable by the gasometer to be connected to theoutlet pipe and adapted to co- 0 erate with the gasometer Which operatest1e gas controlling device for retaining the latter in open positionduring normal pres sure in the main.

2. In an apparatus for lighting and extinguishing gas lamps, thecombination of a pair of communicating gasometers of different crosssectional area, a guide rod, brackets carried by said gasometers,friction rollers on said brackets and adapted to travel on said guiderod, the said bracket carried by the larger gasometer being adapted toengage the bracket of the smaller gasometer and thereby maintain both ofthe gasometers in their raised position after the maximum pressure hasbeen reduced to normal pressure in the main.

3. An apparatus for lighting and extinguishing gas lamps comprising apair of coinmunicatinggasometers of diflerent cross sectional areaprovided with seals, the smaller of which gasometers is provided with aninternal hood and weighted to resist the normal pressure of the gas inthe main, and the larger of which is weighted so as to descend into itsseal at a predetermined pressure in the main and means operable by thelarger gasometer for controlling the movement of the smaller gasometer.

4. In an apparatus for lighting and extinguishing gas lamps, thecombination of a chamber, a pair of communicating gasometers ofdifferent cross sectional area, an inlet and an outlet for said chamber,seals for said gasometers, a coacting hood and seal mounted within thesmaller gasometer for controlling the admission of gas, both of saidgasometers being weighted, the smaller one to resist the normal pressureand the larger one to descend into the seal at a predetermined minimumpressure and means operable by the larger gasometer for retaining thesaid seal in open position during normal pressure in the main.

5. In an apparatus for lighting and extinguishing gaslamps, thecombination of a chamber, a pair of communicating gasometers ofdifferent cross sectional area, means for guiding the gasometers, aninlet and an outlet for said chamber, seals for said gasometers, acoacting hood and seal mounted within the smaller gasometer forcontrolling the admission of gas, both of said gasometers beingweighted, the smaller one to resist the normal pressure and the largerone to descend into the seal at a predetermined minimum pressure, andnieans operable by the larger gasometer for retaining the smallergasometer in elevated position during normal pressure in the main.

6. In an apparatus for lighting and extinguishing gas lamps, thecombination of a chamber, a pair of communicating gasometers ofdifferent cross sectional area, an inlet and an outlet for said chamber,seals for said gasometers, a coacting hood and seal mounted within thesmaller gasometer for controlling the admission of gas, both of saidgasometers being weighted, the smaller one to resist the normal pressureand the larger one to descend into the seal at a predetermined minimumpressure, a guide rod, brackets carried by said gasometers, frictionrollers mounted on the brackets and adapted to travel on said guide rod,said bracket carried by the larger gasometer being adapted to engage thebracket of the smaller gasometer and thereby maintain both of thegasometers in their raised position after the maximum pressure has beenreduced to normal pressure in the main.

In testimony whereof We have hereunto set our hands in presence of twosubscribing Witnesses.

HERBERT HENRY JOHNSON. EDWARD MOIN.

Witnesses:

CHARLES EDWARD GRAHAM, HENRY WA'roHoRNE CLARKE.

